Install PHP 5.4 on AWS Opsworks Ubuntu 12.04 (note that Ubuntu 14.04 will install PHP 5.5 by default)

gistfile1.txt

# Add this to the "setup" activity:

apt_repository "custom-php5-oldstable" do
  uri "http://ppa.launchpad.net/ondrej/php5-oldstable/ubuntu"
  distribution node['lsb']['codename']
  components ["main"]
  keyserver "keyserver.ubuntu.com"
  key "E5267A6C"
  action :nothing
  subscribes :add, "template[/etc/sudoers]", :immediately
  notifies :run, "execute[custom-apt-get-update]", :immediately
end

execute 'custom-apt-get-update' do
  command 'apt-get update'
  action :nothing
end